Reviewing Troops Defense Secretary James N. Mattis walks beside Vietnamese Defense Minister Ngo Xuan Lich as they review troops during a visit to Hanoi, Vietnam, Jan. 25, 2018. DoD photo by Army Sgt. Amber I. Smith SHARE IMAGE: Download Image: Full Size (1.02 MB) Tags: Travels , Pacific Command, James N. Mattis, SecDef, PACOM, Indo-Pacific Photo By: Amber I. Smith VIRIN: 180125-D-SV709-0387A.JPG Photo Gallery